McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, New York MC1502 Power Amplifier Owner’s Manual 13903-2699 Phone: 607-723-3512 www.mcintoshlabs.
Important Safety Information is supplied in a separate document “Important Additional Operation Information Guide” Thank You Your decision to own this McIntosh MC1502 Tube Power Amplifier ranks you at the very top among discriminating music listeners. You now have “The Best.” The McIntosh dedication to “Quality,” is assurance that you will receive many years of musical enjoyment from this unit. Please take a short time to read the information in this manual.
IMPORTANT! INSTRUCTIONS FOR REMOVAL OF FOAM INSERT OVER THE VACUUM TUBES PRIOR TO CONNECTING THE A.C. POWER SUPPLY CORD, START ON THE NEXT PAGE.
Follow these instructions for removal of the packing foam before connecting the AC Power Supply Cord to the MC1502. In order to remove the foam insert surrounding the Vacuum Tubes on the MC1502, it is necessary to temporarily remove the operational Tube Shield Metal Cover. After the foam insert is removed, the Tube Shield Metal Cover is to be re-installed for proper and safe operation of the MC1502 Power Amplifier.
Unpacking the MC1502 and Ventilation Hot Surface Tag Screw Figure 9 Figure 6F OF OFF N ON Figure 3C COM COM BALANCED INPUTS UNBALANCED INPUTS POWER CONTROL R OUTPUT CLASS 2 WIRING L OUTPUT CLASS 2 WIRING T8AL 250V OF N OFF M C 15 0 2 POWER A MPL IFIER ON McINTOSH LABORATORY, INC., BINGHAMTON, NY HANDCRAFTED IN USA WITH US AND IMPORTED PARTS BALANCED UNBALANCED INPUT MODE 120V 50 / 60Hz 5.
General Information 1. For additional connection information, refer to the owner’s manual(s) for any component(s) connected to the MC1502. 2. Apply AC Power to the MC1502 and other McIntosh Component(s) only after all the system components are connected together. Failure to do so may cause a malfunction of system operations as the Microprocessor’s Circuitry inside the components is active when AC Power is applied. 3. The MC1502 includes an Auto Off Power Save Feature and the default setting is enabled.
General Information, Cable Information, Introduction and Performance Features Introduction Now you can take advantage of traditional McIntosh standards of excellence in the MC1502 Tube Power Amplifier. The 150 watt power output per channel will drive any high quality Loudspeaker System. The MC1502 reproduction is sonically transparent and absolutely accurate. The McIntosh Sound is “The Sound of the Music Itself.
Dimensions Dimensions The following dimensions can assist in determining the best location for your MC1502. Right View of the MC1502 Front View of the MC1502 16-3/4" 42.5cm 5-1/2" 14cm 6-1/2" 16.5 cm 3 -9/16" OF OFF N ON 9cm 13" 33cm 18" 45.7cm 13-3/4" 20-9/16" 34.9cm 52.2cm Left View of the MC1502 16-3/4" 42.5cm 5-1/2" Rear View of the MC1502 14.0cm 3 -9/16 6-1/2" 9cm 16.
Rear Panel Connections, Fuse Holder and Switches POWER CONROL IN receives a turn ON or turn OFF signal from a McIntosh component.
Output Terminals When connecting the Loudspeaker Hookup Cables to the MC1502 Power Amplifier Output Terminals please follow the steps below: 1. Rotate the top of the Output Terminal Post counterclockwise until an opening appears. Refer to figures A and B. 2. Insert the Loudspeaker hookup cable into the Output Terminal Opening Post opening or the cable spade Figure B Figure A lug around the center post of the Output Terminal. Refer to figure C. 3.
How to Connect for Operation are indentified as 4Ω (ohms), 8Ω (ohms) or 16Ω (ohms) connection to match the impedance of the Loudspeaker, being careful to observe the correct polarities. If the Loudspeaker’s impedance is in-between the available connections, use the nearest lower impedance connection. Refer to “General Information” Note 6 on page 6 for additional information. WARNING: Loudspeaker Terminals are hazardous live and present a risk of electric shock.
Front Panel Controls and Indicators Left Channel Small Signal Vacuum Tubes Right Channel Small Signal Vacuum Tubes LED Illumination Color Operation Mode Function LED Illumination Color Operation Mode Function Amber Warm-up Audio Signal is muted Amber Audio Signal is muted Green Normal Selected by Tube Light Control Green Normal Selected by Tube Light Control Red (Flash Illumination) Sentry Protection Circuitry is Activated Red (Flash Illumination) Sentry Protection Circuitry is Activat
How to Operate How to Operate Power Control The POWER CONTROL is located on the Front Panel REMOTE of the MC1502. Set the Control OFF ON to the REMOTE Position. Refer to figure 10. The MC1502 Power Amplifier will turn ON or OFF as POWER the Preamplifier it is connected to Figure 10 (via the Power Control Connection) turns On or Off . For manual operation, place the POWER CONTROL to the ON Position as desired.
Specifications Specifications Power Output Minimum sine wave continuous average power output per channel, both channels operating is: 150 watts into 2 ohm loads 150 watts into 4 ohm loads 150 watts into 8 ohm loads Output Load Impedance 2, 4 or 8 ohms Rated Power Band 20Hz to 20,000Hz Total Harmonic Distortion 0.5% maximum harmonic distortion at any power level from 250 milliwatts to rated power, 20Hz to 20,000Hz Dynamic Headroom 1.2dB Frequency Response +0, -0.5dB from 20Hz to 20,000Hz +0, -3.
Packing Instructions Packing Instructions In the event it is necessary to repack the equipment for shipment, the equipment must be packed exactly as shown below. It is very important that the four feet are attached to the bottom of the equipment. This will ensure the proper equipment location on the bottom foam pad. Failure to do this will result in shipping damage. To protect the tubes during shippment, the Foam Insert removed from the MC1502 needs to be reinserted.
McIntosh Laboratory, Inc. 2 Chambers Street Binghamton, NY 13903 www.mcintoshlabs.com The continuous improvement of its products is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice. Printed in the U.S.A. McIntosh Part No.
